S-90866A170 5/8"-11 Thumb Nuts

Key Features & Benefits at a Glance

• Tool-free installation with ergonomic wing design for rapid hand-tightening in tight spaces
• Superior corrosion resistance from zinc-plated steel construction, extending service life in harsh environments
• Reliable thread engagement with Class 2B fit UNC coarse threads, preventing cross-threading and ensuring secure fastening
• Heavy-duty performance with 2 3/4" width and 1 3/8" height for enhanced grip and torque application
• Broad compatibility with standard 5/8"-11 right-hand threaded components across industrial equipment
• Environmental compliance meeting RoHS 3 standards for safe use in regulated industries
• Standardized dimensions including 1 5/32" base diameter for consistent fit in inch-system applications

Professional Applications & Engineering Value

This zinc-plated steel thumb nut solves critical assembly challenges where tool access is limited or frequent adjustments are required. The UNC coarse threading with Class 2B fit provides excellent vibration resistance while accommodating minor misalignments in machinery, electrical enclosures, and structural frameworks. The standard wing nut profile delivers maximum torque transmission for hand-tightening applications in maintenance panels, adjustable fixtures, and temporary installations. Zinc plating creates a sacrificial barrier against oxidation in humid or outdoor environments, making these industrial thumb nuts ideal for manufacturing plants, agricultural equipment, and transportation applications where corrosion protection is essential.

Specification Summary & Compliance

Manufactured to inch system standards with 5/8"-11 UNC coarse threads and Class 2B thread fit for precise dimensional accuracy. Features right-hand thread direction with standard wing nut profile measuring 2 3/4" width × 1 3/8" height and 1 5/32" base diameter. Compliant with RoHS 3 (2015/863/EU) environmental regulations for hazardous substance restriction.